The required angles of x and y are x = 65° and y = 25°
Given is a triangle which is right angled
Thus the sum of the right angled triangle is 180 degrees
So we will write
y° + x + 90 = 180 [ angle sum property of the triangle ]
90 + x + y = 180
let the above equation be considered as equation 1
Since two sides are equal
thus the other angle will also be x°
Also the angle adjacent to 40° can be found out by linear angle property
thus according to this :
x + x + ( 90 - 40 ) = 180 °
2x + 50 = 180
thus subtracting 50 on both sides we get
2x = 130
x = 65°
Thus by equation 1
we can rewrite it as
y + x + 90 = 180
65 + 90 + y = 180
155 + y = 180
this implies y = 180 - 155
y = 25°
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helpppp!!
A certain number of quarters, five times as many pennies as quarters and 12 more
dimes than quarters are worth $8.00. How many of each coin are there?
Answer:
Step-by-step explanation:
i think the answer is 10 or 5
HELP!!WILL MARK BRAINILIEST!!
Which graph shows a proportional relationship between x and y?
Graph C appears to show a proportional relationship between x and y. Because it is a straight line across the origin.
What is a proportional relationship?
Relationships between two variables where their ratios are equal are known as proportional relationships. The fact that one variable is always a constant value multiplied by the other in a proportionate connection is another way to conceive of them.A line graph is a particular sort of graph in which the connecting segments of straight lines represent the data points. A straight line is made up of many points connected at each end.
A straight line with a beginning point of represents a proportionate relationship on a graph (0, 0). By computing a second point and then connecting the two with a straight line, the graph is produced.
As a result, graph C seems to indicate that x and y are proportionate. due to the fact that it crosses the origin directly.
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.......................................
Answer:
c is ur answer
I hope it's help◉‿◉
A family wants to save $100 each month. They record their progress toward this goal at the end of each month. What would a recording of $0 mean?
A recording of $0 for the family simply means that they have not saved anything or have spent all the savings.
What is savings?Savings simply means keeping of miney for a period of time in order to cater for future expenses. Saving is defined as income that is not spent or deferred consumption. Saving methods include putting money aside in a deposit account, a pension account, an investment fund, or as cash. Saving also entails lowering expenses, such as recurring costs.
Here, the family wants to save $100 each month and they record their progress toward this goal at the end of each month.
A recording of $0 simply means no savings.
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Fill in the gaps in the equation below by
completing the square.
x² - 6x-1=(x −
|) ² − |
Answer:
(x -3)² -10
Step-by-step explanation:
You want the vertex form of x² -6x -1, found by completing the square.
Completing the squareThe square of a binomial is ...
(x -a)² = x² -2ax +a²
The constant in this perfect square trinomial is the square of half the coefficient of the linear term: a² = (-2a/2)²
ApplicationTo complete the square for the given quadratic, the perfect square trinomial must have a constant of (-6/2)² = 9. We can add and subtract 9 to rearrange the quadratic to the desired form.
x² -6x -1
= (x² -6x +9) -1 -9 . . . . . . . +9 -9 was added
= (x -3)² -10
Helppp!!! I need help I don’t know how to do this pleasee
Answer:10.85
Step-by-step explanation:
First you have to multiply a, 3 5/6, by b, 5 2/3. Which is 21.7222222, if you simplify it, you would get 21.7. Then you divide the total by 2 and you get 10.85.
Answer:
10 31/36 m
Step-by-step explanation:
formula for area of a triangle base times height times 1/2
we turn the height and base into improper fractions
3 5/6= 23/6
5 2/3=17/3
Now we multiply together to find area
23/6x17/3= 391/18
391/18x1/2=391/36
10 31/36
hopes this helps please mark brainliest
Graph the function.
h(x)=x²-5
Answer: Look at the graph
Step-by-step explanation:
Direction: Opens upVertex: (0,-5)Axis of Symmetry: x = 0Directrix: y= -21/4x: -2 -1 0 1 2y: -1 -4 -5 -4 -1Can I pleaseeeee get some help solving these problems I’m really struggling
Answer:
2. $19,547.04
3. $10,276.54
4. $16,758.38
Step-by-step explanation:
You have three problems in compound interest with different initial payments, interest rates, and compounding intervals. You want the relationship between the initial payment and the future value.
Future value multiplierThe multiplier of a single payment earning annual interest rate r compounded n times per year for t years is ...
k = (1 +r/n)^(nt)
2.For this problem, r=0.09, n=1, t=9. The multiplier of the payment is ...
k = (1 +0.09/1)^(1·9) = 1.09^9 = 2.17189328
Then the future value of $9000 will be ...
FV = $9000 × 2.17189328 ≈ $19,547.04
3.For this problem, r=0.10, n=12, t=4. The multiplier of the payment is ...
k = (1 +0.10/12)^(12·4) = 1.08333...^48 = 1.48935410
Then the future value of $6900 will be ...
FV = $6900 × 1.48935410 ≈ $10,276.54
4.For this problem, r=0.13, n=12, t=13. The multiplier of the payment is ...
k = (1 +0.13/12)^(12·13) = 1.0108333...^156 = 5.3704484
Then the payment that gives a future value of $90,000 will be ...
P = $90,000/5.3704484 = $16,758.38
__
Additional comment
For the spreadsheet calculation, we used the "Goal Seek" capability to adjust the value of cell F4 to 90000 by changing the value in cell B4.
We could have calculated the multiplier as above, then used it different ways for the different problems. Instead, we used one FV( ) function for all of the problems.
Identify the function shown in this graph. 3 17 3 2 12 1 1 2 3 4 5 A. y=-3x +3 B. y = -3x-3 PLEASE HELP ME ANSWER THIS I WILL GIVE 30 POINTS AND A BRAINLYEST
Answer:
It's B. A good way to look at it is the last number. The last number is the y-intercept. Here the y-intercept is -3. That's how I would always figure it out.
The cost of 5 kg of potatoes is £3.40
The cost of 2 kg of carrots is 32p
Work out the total cost of 11 kg of potatoes and 1½ kg of carrots.
Answer:
i know i know its is 8.78 pounds it is easy
Step-by-step explanation:
what you do is that i am smart
The required total cost of the 11 kg of potatoes and 1½ kg of carrots is $7.72.
Given that,
The cost of 5 kg of potatoes is £3.40 the cost of 2 kg of carrots is 32p working out the total cost of 11 kg of potatoes and 1½ kg of carrots.
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
Cost of potatoes per kg = 0.68
Cost of 11 kg of potatoes = 0.68×11 = $7.48
Cost of the carrots per kg = 0.16
Cost of 1.5 kg carrot = 0.24
Total cost of the 11 kg of potatoes and 1½ kg = 7.48 + 0.24= $7.72.
Thus, the required total cost of the 11 kg of potatoes and 1½ kg of carrots is $7.72.
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Solve: √2x-9 = x-6
a) x=9
b) The equation has no solution.
c) x= 5,9
d) x=5
Answer:
A
Step-by-step explanation:
STEP 1:
Isolate the square root on the left hand side
Radical already isolated
√2x-9 = x-6
STEP 2:
Eliminate the radical on the left hand side
Raise both sides to the second power
(√2x-9)2 = (x-6)2
After squaring
2x-9 = x2-12x+36
STEP 3:
Solve the quadratic equation
Rearranged equation
x2 - 14x + 45 = 0
This equation has two rational roots:
{x1, x2}={9, 5}
STEP 4:
Check that the first solution is correct
Original equation
√2x-9 = x-6
Plug in 9 for x
√2•(9)-9 = (9)-6
Simplify
√9 = 3
Solution checks !!
Solution is:
x = 9
STEP 5:
Check that the second solution is correct
Original equation
√2x-9 = x-6
Plug in 5 for x
√2•(5)-9 = (5)-6
Simplify
√1 = -1
Solution does not check
1 ≠ -1
One solution was found :
x=9
Hope this helps!!
Name the Inequalities
Suppose you want to have $600,000 for retirement in 35 years. Your account earns 5% interest. How
much would you need to deposit in the account each month?
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To have $600,000 for retirement in 35 years at 5% interest, one would need to deposit $528.13 in the account each month.
What are periodic deposits?Periodic deposits are monthly cash inflows into a retirement account that accumulates interest by compounding.
To find periodic deposits, we can use an online finance calculator, defining the parameters as follows.
N (# of periods) = 420 months (35 years x 12)
I/Y (Interest per year) = 5%
PV (Present Value) = $0
FV (Future Value) = $600,000
Results:
Monthly Deposits (PMT) = $528.13
Sum of all periodic deposits = $221,814.60
Total Interest = $378,185.40
Thus, monthly deposits of $528.13 can accumulate to $600,000 in 35 years at 5% interest.
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4x (x + 10) + 55 = 180
x = 5/2 and x = -25/2 are the solutions to the equation 4x (x + 10) + 55 = 180.
What is the solution to the quadratic equation?Given the equation in the question;
4x (x + 10) + 55 = 180
To solve for x, apply distributive property to eliminate the parenthesis.
4x (x + 10) + 55 = 180
4x(x) + 4x(10) + 55 = 180
4x² + 40x + 55 = 180
4x² + 40x + 55 - 180 = 0
4x² + 40x - 125 = 0
Now, we use the quadratic formula to solve the quadratic equation.
x = (-b±√(b² - 4ac)) / (2a)
From 4x² + 40x - 125 = 0
a = 4b = 40 c = -125Plug these into the formula and solve for x.
x = (-b±√(b² - 4ac)) / (2a)
x = ( -40 ± √( (40)² - ( 4 × 4 × -125))) / ( 2 × 4 )
x = ( -40 ± √( 1600 - ( -2000) )) / ( 8 )
x = ( -40 ± √( 1600 + 2000 )) / ( 8 )
x = ( -40 ± √( 3600 )) / ( 8 )
x = ( -40 ± 60) / ( 8 )
x = ( -40 - 60) / ( 8 ), ( -40 + 60) / ( 8 )
x = ( -100 )/( 8 ), ( 20 )/( 8 )
x = -25/2, 5/2
Therefore, the solution to the quadratic equation is x = -25/2, 5/2.
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I need help with math please help me..!!!
I need help with math please help me..!!!
I need help with math please help me..!!!
Step-by-step explanation:
please remember you middle school and high school classes, homework and exams.
here on college level this is just meant as a quick reminder.
so, what exactly don't you understand, please, so that I can provide specific guidance ?
6
the vertex : the turn-around point, where the parabola curve changes its tendency : (-3, 0.5)
axis of symmetry : since the parabola opens downwards, the axis of symmetry (it is like a mirror for one half of the curve to the other half) is a vertical line going right through the vertex : x = -3
y-intercept is the y-value when x = 0 : (0, -4)
x-intercepts are the x-values when y = 0 :
(-4, 0) and (-2, 0)
max or min : there is only one identifiable extreme value, it is at the vertex, of course, and is clearly a maximum :
at x = -3 the max value of the function is 0.5
the optimal value is the y-coordinate of the vertex (the function value between the 2 x-intercepts) : 0.5
4
y = 0.5x + 6 is linear. why ? because the highest exponent of x is 1. that creates a proportional relationship between x and y meaning y only increases with x in a constant manner.
y = 2x² + 5 is quadratic. why ? because the highest exponent of x is 2. this squares things, in other words, it makes them quadratic.
the graph as third item in the list is neither. the functional value gets exponentially bigger, the closer x gets to 0.
this looks like y = -1/x = x^(-1)
the graph as forth item in the list is a parabola again, and as such it is quadratic.
What miles per gallon did the car get after 280 miles using 8 gallons of gas?
Answer: 35 miles
Step-by-step explanation:
First we divide 280 by 8 to get the answer per gallon. 280 / 8 = 35, therefore each gallon equals 35 miles.
30 years ago zoe was 2/3 as old as luke, 18 years ago zoe was 5/6 as old as luke how old are they now
Based on the mathematical statements, Zoe is 56 years old and Luke is 66 years old, now
How to determine how old they are now?From the question, we have the following statements that can be used in our computation:
30 years ago
Zoe was 2/3 as old as Luke
18 years ago
Zoe was 5/6 as old as Luke
Let their present ages be represented as
Zoe = x
Luke = y
So, we have the following representations
30 years ago
Zoe was 2/3 as old as Luke
x - 36 = 2/3(y - 36)
18 years ago
Zoe was 5/6 as old as Luke
x - 18 = 5/6(y - 18)
So, we have the following system of equations
x - 36 = 2/3(y - 36)
x - 18 = 5/6(y - 18)
Make x the subject in x - 18 = 5/6(y - 18)
x = 5/6(y - 18) + 16
Substitute x = 5/6(y - 18) + 16 in x - 36 = 2/3(y - 36)
5/6(y - 18) + 16 - 36 = 2/3(y - 36)
Open the brackets
5/6y - 15 + 16 - 36 = 2/3y - 24
Evaluate the like terms
5/6y - 35 = 2/3y - 24
Multiply through by 6
5y - 210 = 4y - 144
Evaluate the like terms
y = 66
Substitute y = 66 in x = 5/6(y - 18) + 16
x = 5/6(66 - 18) + 16
Evaluate
x = 56
Recall that
Zoe = x
Luke = y
So, we have
Zoe = x = 56
Luke = y = 66
Hence, they are 56 and 66 years, now
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Find the scale of a map if 4.2 cm on the map corresponds to an actual distance of 6.3 km.
Answer:
Scale of the map is 1 cm corresponds to an actual distance of 1.5 km
Step-by-step explanation:
According to the question,
4.2 cm on the map corresponds to an actual distance of 6.3 km.
So,
[tex] \rm 1 \: cm \: will \: correspond \\ \rm to \: a \: distance= \dfrac{6.3}{4.2} \: km \\ \rm = 1.5 \: km[/tex]
Scale of the map is represented by 1 cm corresponds to an actual distance of 1.5 km
What is the scale factor?The scale factor states the scale or measurement by which a figure is bigger or smaller than the other figure. The size by which the figure would be reduced or enlarged is called its scale factor.
According to the question we are given that 4.2 cm on the map corresponds to an actual distance of 6.3 km.
Similarly on the map, 4.2 cm corresponds to an actual value of 6.2km distance, this means
Thus 6.2km is the same as (6.2×1000)m = 6200m
therefore, the scale of the map is
= 4.2/6200
= 1/1476.2
that is, 1cm : 1476.2 cm
= 1cm: 1.5km
Scale of the map is represented by 1 cm corresponds to an actual distance of 1.5 km
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Write an inequality that represents the graph
The line represents that x is anywhere from negative infinity to 1:
x < 1
Answer: x<1
Step-by-step explanation:
X is less than one on the graph because everything on the darker line is the solution.
Ex:
-1<1
For all real values of x if f((x)=(x-3)^2 and g(x)=(x+3)^2 what is f(x)-g(x)?
The composition f(x) - g(x) has its value to be 12x
How to evaluate the composite function?The definitions of the functions are given as
f(x) = (x - 3)²
Also, we have the definition of another functions to be given as
g(x) = (x + 3)²
To find the composition f(x) - g(x), we make use of the following equation
f(x) - g(x) = f(x) - g(x)
So, we have the following equation
f(x) - g(x) = f(x) - g(x)
Substitute the known values in the above equation
So, we have the following equation
f(x) - g(x) = (x + 3)² - (x - 3)²
Apply the differece of two squares rules
So, we have
f(x) - g(x) = (x + 3 + x - 3)(x + 3 - x + 3)
So, we have
f(x) - g(x) = (2x)(6)
This gives
f(x) - g(x) = 12x
Hence, the value of the composition is f(x) - g(x) = 12x
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How can you determine if an inverse is a function?
Vesa has two different choices to buy popcorn at the movie
theater. She can buy them in cylinder-shaped boxes with a
length of diameter 20cm and length of height 40cm, or with
a length of diameter 30cm and length of height 20cm.
Which box should Vesa choose if she wants to buy more
popcorn?
Answer:
She should choose the second cylinder-shaped box with a diameter of 30 cm and a height of 20 cm.
Step-by-step explanation:
The volume of a cylinder with a diameter of 20 cm (radius of 10 cm) and a height of 40 cm:
[tex]V=\pi{r^2h}[/tex]
[tex]V=\pi{(10^2)(40)}[/tex]
[tex]V\approx{12566.37\text{ cm}\textsuperscript{3}}[/tex]
The volume of a cylinder with a diameter of 30 cm (radius of 15 cm) and a height of 20 cm:
[tex]V=\pi{r^2h}[/tex]
[tex]V=\pi{(15^2)(20)}[/tex]
[tex]V\approx{14137.17\text{ cm}\textsuperscript{3}}[/tex]
Therefore, if Vesa wants to buy more popcorn, she should choose the second cylinder-shaped box with a diameter of 30 cm and a height of 20 cm.
3(x+6)+5(x-3) bro I actually need help immediately ☠️
Answer:
-3/8
Step-by-step explanation:
3(x+6)+5(x-3)
3x+18+5x-15
8x+3
8x=-3
x= -3/8
6x-5=6x-5 pls help fast
Answer:
0=0
Step-by-step explanation:
Answer: Infinite Solutions
Step-by-step explanation:
Hello! Let's solve this equation.
[tex]\textbf{First, add 5 to both sides.}[/tex][tex]\sf{6x-5=6x-5}[/tex]
↓
[tex]\sf{6x=6x-5+5}[/tex]
↓
[tex]\sf{6x=6x}[/tex]
[tex]\textbf{Next, subtract 6x from both sides.}[/tex][tex]\sf{6x-6x}[/tex]
↓
[tex]\sf{0}[/tex]
[tex]\textbf{So as you see, all the terms \textit{cancel out.}}\\\textbf{The \textsf{given equation} has \textit{\underline{infinite solutions.}}}\\\textbf{The equation is true for any x-value.}[/tex]
[tex]_ < \!\!\!\rule{300}{1}\!\!\!_ >[/tex]
Jacob and Ryan are plumbers. Jacob charges $50 call-
out fee and $70 per hour. Ryan charges $40 call-out fee
and $75 per hour.
Write an expression for the total cost in dollars that
each electrician charges if they work for h hours.
Jacob
Ryan
Answer:
Lets do Jacob's equation first :)
50$ for fee
70$ per hour (h)
Dollars = 70h + 50
Now lets do Ryan's :)
40$ for fee
75 per hour (h)
Dollars = 75h + 40
Have an amazing day!!
Please rate and mark brainliest!
(1,y) and (x,−3).
6x+3y=15
The values of x and y are 4 and 3 respectively, this forms an ordered pair of (1,3) and (4,-3).
What are the the values of x and y?Given the equation and ordered pair the question;
6x + 3y = 15Point: ( 1,y)Point; (x,−3).To determine, the y-value, plug the x-value into the equation and solve for y.
6x + 3y = 15
Plug in x = 1
6(1) + 3y = 15
6 + 3y = 15
3y = 15 - 6
3y = 9
y = 9/3
y = 3
To determine, the x-value, plug the y-value into the equation and solve for x.
6x + 3y = 15
Plug in y = -3
6x + 3( -3 ) = 15
6x - 9 = 15
6x = 15 + 9
6x = 24
x = 24/6
x = 4
Therefore, the ordered pair are (1,3) and (4,−3).
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A fisherman catchs 12 fish in 5 days. How many fish does he get in
5 + x days?
( 60+12x )/5 fish fisherman will catch in 5+x days .
What is unitary method ?The unit method is a method of solving a problem by first obtaining the value of a single unit, then multiplying the value of the single unit to obtain the necessary value.
Assume you go to the market to buy six apples. The shopkeeper told you that he sells 10 apples for 100 rupees. In this case, the apple is the unit and the apple price is the value. Knowing the units and values is important when solving problems using unitary methods.
For simplicity, always write what you calculate on the right and what you know on the left. In the problem above, we know the amount of apples, but we don`t know the value of the apples. Note that the concept of ratio and ratio is used for problems related to this method.
Calculation5 days ------------> 12 fish
1 day --------------> 12/5 fish
5 + x days --------------> 12/5 x (5+x)
= ( 60+12x )/5 fish
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18. How does the
product change when one of the factors in
a multiplication problem is doubled? Give
two examples to support your conclusion.
The product doubles when one of the factors in a multiplication problem is doubled
What is a product?A product in mathematics is the result of multiplication, or an expression that identifies the objects to be multiplied, known as factors. For instance, 30 is the sum of 6 and 5.
In mathematics, multiplying means adding equal groups. The number of things in the group grows as we multiply. A multiplication problem includes the two factors and the product.
For example, 2 × 3 = 6. When 2 is doubled, it becomes 4 and the product will be:
= 4 × 3 = 12
Therefore, the product doubles too.
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Does 4f+2(12 f−4)=3(2f−4)−f+3 have one solution, no solution, or infinitely many solutions?
Based on the calculations, this equation 4f + 2(12f − 4) = 3(2f − 4) − f + 3 has one solution, which is equal to -1/23.
What is no solution?In Mathematics, no solution is also referred to as zero solution, and an equation is said to have no solution when the left hand side and right hand side of the equation are not the same or equal.
This ultimately implies that, an equation would have no solution or zero solution when both sides of the equal sign are not the same and the variables cancel out.
From the information provided, we have the following equation:
4f + 2(12f − 4) = 3(2f − 4) − f + 3
Opening the bracket, we have:
4f + 24f - 8 = 6f - 12 - f + 3
28f - 8 = 5f - 9
By collecting like terms, we have the following:
28f - 5f = -9 + 8
23f = -1
Dividing both sides by 23, we have:
f = -1/23
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What is the y-intercept of the function f(x) = 2 ^x?
A.27
B.2
C. 6
D. 1
Answer:
D
Step-by-step explanation:
the y- intercept is the value of y on the y- axis where the function crosses.
the function crosses the y - axis when x = 0
substitute x = 0 into f(x)
f(0) = [tex]2^{0}[/tex] = 1
y- intercept is 1